#########################scapy_ping_one##############################
#!/usr/bin/python3.4
# -*- coding=utf-8 -*-
import logging
logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
import re
import time
import sys
from scapy.all import *
def scapy_ping_one(host,i):
    idi = int(i)
	packet = IP(dst=host, ttl=1, id=idi)/ICMP(id=100,seq=idi)/b'Welcome to qytang'
	ping = sr1(packet, verbose = False)
	if ping:
		os._exit(3)
if __name__ == '__main__':
	scapy_ping_one(sys.argv[1],sys.argv[2])

#######################scapy_ping_scan################################
#!/usr/bin/python3.4
# -*- coding=utf-8 -*-
import logging
logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
import re
import time
import multiprocessing
from scapy_ping_one import scapy_ping_one
from scapy.all import *
def scapy_ping_scan(network):
    scan_network = re.search('([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)/([0-9]+)', network).groups()
	#print(scan_network)
	processes = []
	if scan_network[4] == '24':
		for i in range(254):
			i = i + 1
			ipaddr = scan_network[0]+'.'+scan_network[1]+'.'+scan_network[2]+'.'+str(i)
			ping_one = multiprocessing.Process(target=scapy_ping_one, args=(ipaddr, i))
			ping_one.start()
			processes.append(ping_one)
	ip_no = 1
	for process in processes:
		if process.exitcode == 3:
			ok_ip = scan_network[0]+'.'+scan_network[1]+'.'+scan_network[2]+'.'+str(ip_no)
			print(ok_ip + ' OK!!!')
		else:
			process.terminate()
		ip_no = ip_no + 1

if __name__ == '__main__':
	scapy_ping_scan(sys.argv[1])
###########################测试效果######################################
[root@Fedora python]# ./scapy_ping_scan.py 202.100.1.0/24
202.100.1.100 OK!!!
202.100.1.200 OK!!!